426 



GENERAL PHYSIOLOGY 



substances, but in plants that, like Mimosa, move by .changes 

 of turgescence. If single induction-shocks be allowed to act upon 



FiQ. 207. — Myographic curves from the gastrocnemius of the frog. /, Single coutmctions pro- 

 duced by single opening induction-shocks. II, Incomplete tetanus, produced by opening in 

 duction-shocks following in rapid succession. Ill, Complete tet.inus, produced by induction- 

 -shocks in very rapid succession. 



a Mimosa the branches and leaves of which are outspread, they 

 have exactly the same effect as mechanical stimulation : the 



